Reduction of 1+1 resonance enhanced MPI spectra to population distributions: Application to the NO A 2Σ+–X 2Π system
Reduction of 1+1 resonance enhanced MPI spectra to population distributions: Application to the NO A 2Σ+–X 2Π system
复制标题
将 1+1 共振增强 MPI 谱还原为布居分布：在 NO A 2Σ+–X 2Π 系统中的应用
DOI：
10.1063/1.451557
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发表时间：
1986
影响因子：
4.4
通讯作者：
R. Zare
中科院分区：
文献类型：
--
作者：
D. C. Jacobs;R. Madix;R. Zare
提出了一种两步方法，用于从 1+1 共振增强多光子电离 (REMPI) 光谱中提取基态布居分布和对准因子。第一步，离子信号在收集时根据激光强度的变化进行校正，生成等功率谱。在第二步中，通过校正饱和度和中间状态对准的相互依赖的影响，从等功率谱导出总体和对准。该过程适用于使用 1+1 REMPI 过程的一氧化氮的室温热分布，其中 NO A 2Σ+–X 2Π (0,0) 带的线构成共振跃迁。本处理能够在广泛的实际操作条件下恢复已知的振动群体分布，而与分支选择无关。
A two‐step methodology is presented for extracting ground state population distributions and alignment factors from 1+1 resonance enhanced multiphoton ionization (REMPI) spectra. In the first step the ion signal is corrected for variation with laser intensity as it is collected, generating an isopower spectrum. In the second step populations and alignments are derived from the isopower spectrum by correcting for the interdependent effects of saturation and intermediate state alignment. This procedure is applied to a room temperature thermal distribution of nitric oxide using the 1+1 REMPI process in which lines of the NO A 2Σ+–X 2Π (0,0) band constitute the resonant transition. The present treatment is able to recover the known rovibrational population distribution, independent of branch choice, over a wide range of practical operating conditions.